Shibley has almost 20 years of telecommunications experience having served as president of Houston Cellular Telephone Company and also worked as general manager of BellSouth Mobility DCS in Raleigh, NC; general manager of BellSouth Mobility in New Orleans, LA; and general manager of American Cellular Corporation in Mobile, AL.

John Hoffman, chairman and keynote speaker for the IBC GPRS Congress and current senior consulting director for the GSM Association, responsible for the GPRS Roaming Initiative as well as development of the GSM Certification Forum, was former regional director for BellSouth Mobility; chief operating officer of SONOFON in Denmark; director of BellSouth International in Brussels, Belgium; general manager of BellSouth Mobility DCS and chief operating officer of Pocket Communications in Washington, DC.

Clift first joined BellSouth Mobility in 1991 as director of engineering and was promoted several times to his eventual role of president of American Cellular Communications Corporation and BellSouth Mobility DCS in January, 2000.

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